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Class 12 Passed Questions asked by Filo students

Question 1

A simple harmonic motion is represented by

F (t) = 10

sin (0.5)

. The amplitude of the S.H.M is

$a = 30$
$a = 20$
$a = 10$
$a = 5$

Topic:

Waves & Oscillation

View solution

Question 2

A coin is placed on a horizontal platform which undergoes vertical simple harmonic motion of angular frequency

ω

. The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time

at the mean position of the platform
for an amplitude of $\frac{g}{ω ^{2}}$
for an amplitude of $\frac{g ^{2}}{ω ^{2}}$
at the highest position of the platform

Topic:

Waves & Oscillation

View 7 solutions

Question 3

If the speed of the bike is

36 km / h

, then what is the total distance that the bike travels?

$400 km$
$380 km$
$200 km$
$320 km$

Topic:

Mechanics

View solution

Question 4

a = 4 m / s^{2}

t = 2 ser

displacement

= ?

Topic:

Mechanics

View 7 solutions

Question 5

6. Two blocks of masses

8 kg

and

4 kg

respectively are connected by a string as shown. Calculate their accelerations if they are initially at rest on the floor, after a force of

100 N

is applied on the pulley in the upward direction

l e f t (g = 10 m / s^{2} i g h t)

Topic:

Mechanics

View 7 solutions

Question 6

A projectile is thrown in the upward direction making an angle of

6 0^{\circ}

with the horizontal direction with a velocity of

147 m s^{- 1}

. Then the time after which its inclination with the horizontal is

4 5^{\circ}

, is

$15 s$
$10.98 s$
$5.49 s$
$2.745 s$

Topic:

Mechanics

View 12 solutions

Question 7

Find the electric field at a point

P

on the perpendicular bisector of a uniformly charged rod. The length of the rod is

L

, the charge on it is

Q

and the distance of

P

from the centre of the rod is

a

Topic:

Electrostats

View 10 solutions

Question 8

2. Determine the acceleration of the masses w.r.t. lift and tension in the string if the whole system is moving vertically upwards with uniform acceleration

a_{0} . l e f t (m_{1} > m_{2} i g h t)

186

Topic:

Mechanics

View 5 solutions

Question 9

- Or comparing the emfs of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment @insuccessful?

The emf of the standard cell is larger than the $E$ emfs of the two cells
The diameter of the wires is the same and uniform throughout
The number of wires is ten
The emf of the standard cell is smaller than the emfs of the two cells

Topic:

Electrostats

View solution

Question 10

For comparing the emfs of two cells with a potentiometer, a standard cell is used to develop a potential gradient ed anto along the wires. Which of the following possibilities

The emf of the standard cell is larger than the $E emf$ s of the two cells
The diameter of the wires is the same and uniform throughout
The number of wires is ten
The emf of the standard cell is smaller than the emfs of the two cells

Topic:

Electrostats

View solution

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Question 11

The velocity time graph of a body moving along a straight line is shown in the figure.The ratio of the average velocities during the time

t_{1}

and

t_{2}

$1 : 1$
$2 : 1$
$3 : 1$
$1 : 3$

Topic:

Mechanics

View 2 solutions

Question 12

For comparing the emfs of two cells with a potentiometer, a standard cell is used to develop a potential gradient a the wires. Which of the following possibilities would make the experiment ansuccessful?

The emf of the standard cell is larger than the $E$ emfs of the two cells
The diameter of the wires is the same and uniform throughout
The number of wires is ten
The emf of the standard cell is smaller than the emfs of the two cells

Topic:

Electrostats

View solution

Question 13

A particle is projected vertically upwards with a speed of

g R

from earths surface. The maximum height attained by it is (Where

R

is the radius of earth) [NCERT Pg. 196]

$R /2$
$R$
$2 R$
$R /4$

Topic:

Mechanics

View 2 solutions

Question 14

Gravel is dropped onto a conveyer belt at a rate of

2 avd $cos θ$
avd $cos θ$

Topic:

Mechanics

View solution

Question 15

Que 1.26. Determine the reactions at

B

and

E

of the beam, loads as shown in Fig. 1.26.1 below.

Topic:

Mechanics

View solution

Question 16

energy 32. A particle executes SHM with frequency

f

. The frequency with which its kinetic energy oscillates is

$f /2$
$f$
$2 f$
$4 f$

Topic:

Waves & Oscillation

View 2 solutions

Question 17

When a particle oscillates simple harmonically, its potential energy varies periodically. If the frequency of oscillation of the particle is

n

, the frequency of potential energy variation is

$n /2$
$n$
$2 n$
$4 n$

Topic:

Waves & Oscillation

View solution

Question 18

A stone is dropped from a height

h

. It hits the ground with a certain momentum

P

. If the same stone is dropped from a height

100%

more than the previous height, the momentum when it hits the ground will change by : [2012M]

$68%$
$41%$
$200%$
$100%$

Topic:

Mechanics

View 47 solutions

Question 19

A wheel of moment of inertia

1 0^{3} kgm^{2}

is rotating with angular speed of

5 rad / s

. The torque required to stop it in

2 s

is [NCERT Pg. 154]

$1250 Nm$
$5000 Nm$
$2000 Nm$
$2500 Nm$

Topic:

Mechanics

View 13 solutions

Question 20

The length of seconds hand of a watch is

1 cm

. The change in velocity of its tip in 15 second (in

cm / s

) is

Zero
$\frac{π}{30 2}$
$\frac{π}{30}$
$\frac{2 π}{30 2}$

Topic:

Mechanics

View solution

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Class 12 Passed Questions asked by Filo students

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