Electromagnetic Induction — Physics STD 12 Science — Question

An object is released from rest. The time it takes to fall through a distance h and the speed of the object as it falls through this distance are measured with a pendulum clock. The entire apparatus is taken on the moon and the experiment is repeated:

1. The measured times are same.
2. The measured speeds are same.
3. The actual times in the fall are equal.
4. The actual speeds are equal.

Figure shows two capacitors connected in series and joined to a battery. The graph shows the variation in potential as one moves from left to right on the branch containing the capacitors:

1. C₁ > C₂
2. C₁ = C₂
3. C₁ < C₂
4. The information is not sufficient to decide the relation between C₁ and C₂.

In Rutherford scattering experiment, what will be the correct angle for α scattering for an impact parameter b = 0

(a) 90°

(b) 270°

(c) 0°

(d) 180°

An electric dipole placed in a uniform elecrtric field exepriences:

A mechanical wave propagates in a medium along the X-axis. The particles of the medium.

1. Must move on the X-axis
2. Must move on the Y-axis
3. May move on the X-axis
4. May move on the Y-axis.

Which of the following statement is true

(a)   has 78 neutrons	(b)
(c)	(d)

Two electric bulbs, one of 200 volt 40 watt and the other 200 volt 100 watt are connected in a house wiring circuit

(a) They have equal currents through them

(b) The resistance of the filaments in both the bulbs is same

(c) The resistance of the filament in 40 watt bulb is more than the resistance in 100 watt bulb

(d) The resistance of the filament in 100 watt bulb is more than the resistance in 40 watt bulb

When white light passes through the achromatic combination of prisms, then what is observed

(a) Only deviation	(b) Only dispersion
(c) Deviation and dispersion	(d) None of the above

A 1mm thick paper of dielectric constant 4 lies between the plates of a parallel-plate capacitor. It is charged to 100 volt the intensity of electric field between the plates of the condenser will be:

The graph gives the magnitude B(t) of a uniform magnetic field that exists throughout a conducting loop, perpendicular to the plane of the loop. Rank the five regions of the graph according to the magnitude of the emf induced in the loop, greatest first

(a) b > (d = e) < (a = c)	(b) b > (d = e) > (a = c)
(c) b < d < e < c < a	(d) b > (a = c) > (d = e)