Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

A reaction between a proton and  that produces  must also liberate

(a)

(b)

(c)

(d)

What is the ratio of the polarization to ε_o times the electric field called?

Assertion :  The ion cannot move with a speed beyond a certain limit in a cyclotron.

Reason     : As velocity increases time taken by ion increases.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

The energy in MeV is released due to transformation of 1 kg mass completely into energy (c = 3 

(a) 7.625 ×10 MeV

(b) 10.5

(c) 2.8

(d) 5.625

The temperature of an object is observed to rise in a period. In this period:

1. Heat is certainly supplied to it.
2. Heat is certainly not supplied to it.
3. Heat may have been supplied to it.
4. Work may have been done on it.

When a photon stimulates the emission of another photon, the two photons have:

20 μA current flows for 30 seconds in a wire, transfer of charge will be

(a) 2

(b) 4

(c) 6

(d) 8

Heat produced in a wire of resistance R due to current flowing at constant potential difference is proportional to

(a)

(b)

(c) R

(d)

The line that draws power supply to your house from street has:

Two coils are at fixed locations. When coil 1 has no current and the current in coil 2 increases at the rate of 15.0As^-1, the emf in coil 1 is 25mV. When coil 2 has no current and coil 1 has a current of 3.6A, the flux linkage in coil 2 is.