Units, Dimensions and Measurement — JEE physics STD 12 Science — Question

Assertion : The tangent galvanometer can be made more sensitive by increasing the number of turns of its coil.
Reason : Current through galvanometer is proportional to the number of turns of coil.

Assertion : The current gain in common base circuit is always less than one.
Reason : At constant collector voltage the change in collector current is more than the change in emitter current.

Assertion : Multiplying any vector by an scalar is a meaningful operations.
Reason : In uniform motion speed remains constant.

Assertion : Sterss is the internal force per unit area of a body.
Reason : Rubber is less elastic than steel.

Assertion : The shape of an automobile is so designed that its front resembles the stream line pattern of the fluid through which it moves.
Reason : The resistance offered by the fluid is maximum.

Assertion : Faraday's laws are consequences of conservation of energy.
Reason : In a purely resistive ac circuit, the current lags behind the e.m.f. in phase.

Assertion : The slope of displacement-time graph of a body moving with high velocity is steeper than the slope of displacement-time graph of a body with low velocity.
Reason : Slope of displacement-time graph = Velocity of the body.

Assertion : Bending a wire does not effect electrical resistance.
Reason : Resistance of wire is proportional to resistivity of material.

Assertion : Ocean waves hitting a beach are always found to be nearly normal to the shore.
Reason : Ocean waves are longitudinal waves.

Assertion : An alternating current does not show any magnetic effect.
Reason : Alternating current varies with time.