Electromagnetic Waves — Physics STD 12 Science — Question

We can reduce eddy currents in the core of transformer(a) By increasing the number of turns in secondary coil(b) By taking laminated core(c) By making step-down transformer(d) By using a weak ac at high potential

In a region of constant potential:

Which of the following statement is true

Complete the following statements with an appropriate word/ term be filled in the blank space(s).
The force of attraction or repulsion between two charges is given by ......................

Assertion :   Moon is seen as it partly reflects the sun light falling on it
Reason     :  Moon is a satellite of earth. It does not emit light of its own(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.

A charged particle moves in a gravity-free space without change in velocity. Which of the following is are possible:

When a charged particle enters a uniform magnetic field its kinetic energy(a) Remains constant(b) Increases(c) Decreases(d) Becomes zero

When two light nuclei are fused together to form a single heavy nucleus this process is called :