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Fig. represents a crystal unit of cesium chloride, CsCl. The cesium atoms, represented by open circles are situated at the corners of a cube of side 0.40nm, whereas a Cl atom is situated at the centre of the cube. The Cs atoms are deficient in one electron while the Cl atom carries an excess electron.(a) What is the net electric field on the Cl atom due to eight Cs atoms?(b) Suppose that the Cs atom at the corner A is missing. What is the net force now on the Cl atom due to seven remaining Cs

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Two charges q and –3q are placed fixed on x-axis separated by distance ‘d’. Where should a third charge 2q be placed such that it will not experience any

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Fig. shows the electric field lines around three point charges A, B and C. (a) Which charges are positive? (b) Which charge has the largest magnitude?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Fig. shows the electric field lines around three point charges A, B and C. In which region or regions of the picture could the electric field be zero? Justify your answer. (i) near A, (ii) near B, (iii) near C, (iv)

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The Equation of current in AC circuit is `I=4sin[100pi+pi/3] A` . Calculate. (i) RMS Value (ii) Peak Value (iii) Frequency (iv) Initial phase (v) Current at `t =

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Calculate the resistance or inductance required to operate a lamp (60V, 10W) from a source of (100 V, 50

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A choke coil of resistance R and inductance L is connected in series with a capacitor C and complete combination is connected to a.c. voltage, Circuit resonates when angular frequency of supply is `omega = omega_0`. (a) Find out relation betwen `omega_0, L and C` (b) What is phase difference between V and I at resonance, is it changes when resistance of choke coil is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A straight wire carrying a current of 12 A is bent into a semi-circular arc of radius 2.0 cm as shown in Fig. (a). Consider the magnetic field B at the centre of the arc.(i) What is the magnetic field due to the straight segments?(ii) In what way the contribution to B from the semicircle differs from that of a circular loop and in what way does it resemble?(iii) Would your answer be different if the wire were bent into a semi-circular arc of the same radius but in the opposite way as shown in Fig.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the

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A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of 5 A. What is the magnitude of the magnetic field inside the

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The horizontal component of the earth’s magnetic field at a certain place is 3.0 ×10–5 T and the direction of the field is from the geographic south to the geographic north. A very long straight conductor is carrying a steady current of 1A. What is the force per unit length on it when it is placed on a horizontal table and the direction of the current is(i) east to west;(ii) south to

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In the circuit (Fig. ) the current is to be measured. What is the value of the current if the ammeter shown(i) is a galvanometer with a resistance RG = 60.00 Ω;(ii) is a galvanometer described in (a) but converted to an ammeter by a shunt resistance r s = 0.02 Ω;(iii) is an ideal ammeter with zero

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A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the

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What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30º with the direction of a uniform magnetic field of 0.15

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A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the

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Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30º with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the

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Two moving coil meters, M1 and M2 have the following particulars: R1 = 10 Ω, N1 = 30, A1 = 3.6 × 10–3 m2 , B1 = 0.25 T R2 = 14 Ω, N2 = 42, A2 = 1.8 × 10–3 m2 , B2 = 0.50 T (The spring constants are identical for the two meters). Determine the ratio of(i) current sensitivity (ii) voltage sensitivity of M2 and M1

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In a chamber, a uniform magnetic field of 6.5 G (1 G = 10 –4 T) is maintained. An electron is shot into the field with a speed of 4.8 × 106 m s–1 normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit. (e = 1.5 × 10–19 C, `m_e` = 9.1×10–31

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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