Cosθi^ + Sinθj^ is a_________________?

A. Vector
B. Position vector
C. Vector in the direction at angle θ with an x-axis
D. The unit vector in the direction at angle θ with an x-axis

Maximum number of components of a vector may be________________?

A. 1
B. 2
C. 3
D. Infinite

Which one is not correct for a vector A= 2i+2j+3k ?

A. Has direction 45° with an x-axis
B. Has magnitude 2
C. Has magnitude 2 and direction °=45° with a y-axis
D. Has magnitude -2

The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?

A. 30°
B. 60°
C. 90°
D. 120°

An A.C series circuit containing 4Ω resistance and 3Ω inductive reactance. The impedance of the circuit is______________?

A. 1ω
B. 5ω
C. 7ω
D. 7ω

An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ?

A. 10mh
B. 12mh
C. 16mh
D. 20mh

Choose the correct statement. In the case of AC circuit ohms law holds for_______________?

A. Peak values of voltage and current
B. Effective values of voltage and current
C. Instantaneous values of voltage and current
D. All of the above

The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________?

A. Zero
B. 45°
C. 90°
D. 180°

n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________?

Ia. v = vr+vl+vc
B. V2 = vr2+vl2+vc2
C. V2 = vr2+(vl-vc)2
D. V2 = vl2+(vr-vc)2

A voltage V = V0 cos ωt is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by___________?

A. V√/√2r
B. V/√2√r
C. V02/√2r
D. 2/√2√r