Recent questions tagged marks4

0 votes

0 answers

Five charges, q each are placed at the corners of a regular pentagon of side ‘a’ (Fig.).

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

0 votes

0 answers

Consider a sphere of radius R with charge density distributed as ρ (r ) = ≤ kr r R for = > 0 for r R .(a) Find the electric field at all points r.(b) Suppose the total charge on the sphere is 2e where e is the electron charge. Where can two protons be embedded such that the force on each of them is zero. Assume that the introduction of the proton does not alter the negative charge

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

0 votes

0 answers

Consider a sphere of radius R with charge density distributed as `ρ (r ) = kr ' for ' r le R` `ρ (r ) =0 ' for ' r > R` . (i) Find the electric field at all points r.(ii) Suppose the total charge on the sphere is 2e where e is the electron charge. Where can two protons be embedded such that the force on each of them is zero. Assume that the introduction of the proton does not alter the negative charge

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

0 votes

0 answers

If `V = 100 sin 100 t volt and I = 100 sin (100 t +pi/3) mA` for an A.C. circuit then find out(a) phase difference between V and I (b) total impedance, reactance, resistance(c) power factor and power dissipated (d) components contains by

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

0 votes

0 answers

Magnetic flux in a circular coil of resistance `10Omega` changes with time as shown in figure. `ox` direction indicates a direction perpendicular to paper inwards. Column–I Column–II (A) At 1 second induced current is (P) Clockwise (B) At 5 second induced current is (Q) Anticlockwise (C) At 9 second induced current is (R) 0.5 A (D) At 15 second induced current is (S) 5 A (T) None of these

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

0 votes

0 answers

In the circuit shown in figure `E=25V, L=2H, C=60 muF, R_1 = 5Omega and R_2=10Omega`. Switch S is closed at `t = 0.` Column-I Column-II (A) Current through `R_1` at t = 0 (P) 0 (B) Current through `R_2` at t = 0 (Q) 5A (C) Current through `R_1` at `t =oo` (R) 2.5 A (D) Current through `R_2` at `t =oo` (S) 7.5 A (T) None of these

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

0 votes

0 answers

One day Chetan's mother developed a severe stomach ache all of a sudden. She was rushed to the doctor who suggested for an immediate endoscopy test and gave an estimate of expenditure for the same. Chetan immediately contacted his class teacher and shared the information with her. The class teacher arranged for the money and rushed to the hospital. On realising that Chetan belonged to a below average income group family, even the doctor offered concession for the test fee. The test was conducted successfully. Answer the following questions based on the above information. (i) Which principle in optics is

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

0 votes

0 answers

Position of a particle in shm is y = 3 sin ( π 2 t + π 4 ) m

asked Mar 20, 2022 in 11th Physics by varun (6.7k points)

0 votes

0 answers

A book with many printing errors contains four different formulas for the displacement y of a particle undergoing a certain periodic motion : (a) y = a sin 2π t/T (b) y = a sin vt (c) y = (a/T) sin t/a (d) y`(asqrt2)`(sin 2πt/T + cos 2πt/T ) (a = maximum displacement of the particle, v = speed of the particle. T = time-period of motion). Rule out the wrong formulas on dimensional

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

0 votes

0 answers

Write the max value of y = sin x y = cos x y = 2sin x y = 2sin 2x

asked Mar 17, 2022 in 11th Physics by anonymous

0 votes

0 answers

Draw graphs of y = sin x y = cos x y = 2sin x y = 2sin 2x

asked Mar 17, 2022 in 11th Physics by anonymous

0 votes

0 answers

Difference of two perfect cubes is 189. If the cube root of the smaller of the two numbers is 3, find the cube root of the larger

asked Jan 18, 2022 in 8th-maths by krutika (1.7k points)

0 votes

0 answers

Find the number of plants in each row if 1024 plants are arranged so that number of plants in a row is the same as the number of

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

0 votes

0 answers

A hall has a capacity of 2704 seats. If the number of rows is equal to the number of seats in each row, then find the number of seats in each

asked Jan 18, 2022 in 8th-maths by uday (1.6k points)

0 votes

0 answers

A General wishes to draw up his 7500 soldiers in the form of a square. After arranging, he found out that some of them are left out. How many soldiers were left

asked Jan 18, 2022 in 8th-maths by purvi (1.8k points)

0 votes

0 answers

8649 students were sitting in a lecture room in such a manner that there were as many students in the row as there were rows in the lecture room. How many students were there in each row of the lecture

asked Jan 18, 2022 in 8th-maths by nishit (1.8k points)

0 votes

0 answers

Rahul walks 12m north from his house and turns west to walk 35m to reach his friend’s house. While returning, he walks diagonally from his friend’s house to reach back to his house. What distance did he walk while

asked Jan 18, 2022 in 8th-maths by Arun (1.7k points)

0 votes

0 answers

A 5.5m long ladder is leaned against a wall. The ladder reaches the wall to a height of 4.4m. Find the distance between the wall and the foot of the

asked Jan 18, 2022 in 8th-maths by vaibhav (1.7k points)

0 votes

0 answers

A king wanted to reward his advisor, a wise man of the kingdom. So he asked the wiseman to name his own reward. The wiseman thanked the king but said that he would ask only for some gold coins each day for a month. The coins were to be counted out in a pattern of one coin for the first day, 3 coins for the second day, 5 coins for the third day and so on for 30 days. Without making calculations, find how many coins will the advisor get in that

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

0 votes

0 answers

Find three numbers in the ratio 2:3:5, the sum of whose squares is

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

Recent questions tagged marks4

Categories