Ray Optics and Optical Instruments — Physics STD 12 Science — Question

In parallel combination of capacitors, the effective capacitance:

Which of the following uses the principle of electromagnetic induction?

Assertion : The ionising power of b-particle is less compared to a-particles but their penetrating power is more.
Reason     : The mass of b-particle is less than the mass of a-particle.(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.

Assertion  :   A circular loop carrying current lies in XY plane with its center at origin having a magnetic flux in negative Z-axis.
Reason      : Magnetic flux direction is independent of the direction of current in the conductor.(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 current flowing through a lamp marked as 50 W and 250 V is(a) 5 amp  (b) 2.5 amp(c) 2 amp  (d) 0.2 amp

In electromagnetic spectrum, the component whose wavelength is minimum is:

When the current through a solenoid increases at a constant rate, the induced current(a) Is constant and is in the direction of the inducing current(b) Is a constant and is opposite to the direction of the inducing current(c) Increases with time and is in the direction of the inducing current(d) Increases with time and opposite to the direction of the inducing current

Assertion  :   When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur.
Reason      : Some energy disappears in the form of heat, sparking etc.(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.