Recent questions tagged chapter2

0 votes

0 answers

A ball of mass 1 gm and charge `10^(–8) c` moves from a point A, where the potential is 600 volt to the point B where the potential is zero. Velocity of the ball of the point B is 20cm/s. The velocity of the ball at the point A will be

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

0 votes

0 answers

Three charges Q, +q and +q are placed at the vertices of an equilateral triangle of side `l` as shown in the figure. It the net electrostatic energy of the system is zero, then Q is

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

0 votes

0 answers

Electric potential at any point is `V = –5x + 3y + sqrt15z` , then the magnitude of the electric field is .....

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

0 votes

0 answers

A small conducting sphere of radius r is lying concentrically inside a bigger hollow conducting sphere of radius R. The bigger and smaller sphere are charged with Q and q (Q > q) and are insulated from each other. The potential difference between the sphers will be

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

0 votes

0 answers

Calculate the angle of 10

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Calculate the angle of 1′ (minute of arc or

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Calculate the angle of 1″(second of arc or arc second) in radians. Use `360^0`=2π rad, 10=60′ and 1′ = 60

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

A man wishes to estimate the distance of a nearby tower from him. He stands at a point A in front of the tower C and spots a very distant object O in line with AC. He then walks perpendicular to AC up to B, a distance of 100 m, and looks at O and C again. Since O is very distant, the direction BO is practically the same as AO; but he finds the line of sight of C shifted from the original line of sight by an angle θ= 400 (θ is known as ‘parallax’) estimate the distance

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

The moon is observed from two diametrically opposite points A and B on Earth. The angle θ subtended at the moon by the two directions of observation is `1^o 54′`. Given the diameter of the Earth to be about `1.276 xx 10^7` m, compute the distance of the moon from the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

The Sun’s angular diameter is measured to be 1920′′. The distance D of the Sun from the Earth is `1.496 xx 10^11` m. What is the diameter of the Sun

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

If the size of a nucleus (in the range of `10^(–15)m` to `10^(–14)m`) is scaled up to the tip of a sharp pin, what roughly is the size of an atom ? Assume tip of the pin to be in the range `10^(–5)m` to

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Two clocks are being tested against a standard clock located in a national laboratory. At 12:00:00 noon by the standard clock, the readings of the two clocks are : _ Clock 1 Clock 2 Monday 12:00:05 10:15:06 Tuesday 12:01:15 10:14:59 Wednesday 11:59:08 10:15:18 Thursday 12:01:50 10:15:07 Friday 11:59:15 10:14:53 Saturday 12:01:30 10:15:24 Sunday 12:01:19 10:15:11 If you are doing an experiment that requires precision time interval measurements, which of the two clocks will you prefer

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

We measure the period of oscillation of a simple pendulum. In successive measurements, the readings turn out to be 2.63 s, 2.56 s, 2.42 s, 2.71s and 2.80 s. Calculate the absolute errors, relative error or percentage

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

1 answer

The temperatures of two bodies measured by a thermometer are `t_1 = 20 ^0C ± 0.5 ^0C` and `t_2 = 50 ^0C ± 0.5 ^0C`. Calculate the temperature difference and the error their

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

The resistance R = V/I where V = (100 ± 5)V and I = (10 ± 0.2)A. Find the percentage error in

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Find the relative error in Z, if `Z =

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

The period of oscillation of a simple pendulum is `T. = 2π sqrt(L/G)` Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using a wrist watch of 1 s resolution. What is the accuracy in the determination of g

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Each side of a cube is measured to be 7.203 m. What are the total surface area and the volume of the cube to appropriate significant

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

5.74 g of a substance occupies `1.2 cm^3`. Express its density by keeping the significant figures in

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

Let us consider an equation `1/2mv^2=mgh` where m is the mass of the body, v its velocity, g is the acceleration due to gravity and h is the height. Check whether this equation is dimensionally

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

Page:

« prev
1
...
8
9
10
11
12
13
14
...
47
next »