A cube of side 5 cm has a charge of 6 C. The surface density of charge is:
A. 100 C m–2
B. 200 C m–2
C. 300 C m–2
D. 400 C m–
The core of a transformer is laminated to reduce energy losses due to:
A. Eddy currents
B. Hysteresis
C. Resistance in winding
D. None of these
Electric current in a solid metal conductor is caused by the movement of what:
A. Protons
B. Electrons
C. Metal atoms
D. Metal ions
A Stone thrown from the top of a tall building follows a path that is:
A. Circular
B. Made of two straight line segments
C. Hyperbolic
D. Parabolic
The speed of light will be minimum while passing through:
A. Vaccum
B. Glass
C. Water
D. Air
Farad is the unit of:
A. inductance
B. voltage
C. capacitance
D. None of these
The efficiency of the Carnot engine working between 150°C and 50°C is:
A. 50%
B. 100%
C. 23.6%
D. 29.4%
A force applied on a body through the string is called:
A. Weight
B. Momentum
C. Tension
D. Torque
Gravitation force of moon is:
A. 7.2 m/s²
B. 1.62 m/s²
C. 9.8 m/s²
D. 3.75 m/s²
Gravitation force of sun is:
A. 274 m/s²
B. 362 m/s²
C. 300 m/s²
D. None of these
