791. What is kinetic energy of a particle of mass 2 kg moving with a speed of 20 m/s?
A. 340 joule
B. 360 joule
C. 380 joule
D. 400 joule

792. A collision in which total kinetic energy is NOT the same before and after the collision is known as
A. elastic collision
B. inelastic collision
C. friction
D. resistance

793. The SI unit of pressure is
A. pascal
B. kelvin
C. weber
D. hertz

794. If A=2i+3j-4k and B=6i-j+5k then A·b=?
A. –7
B. 7
C. –11
D. 11

795. When a force F=4i+6j is applied to an object, it undergoes a displacement of d=2i+4j. What is the work done?
A. 26 joule
B. 28 joule
C. 30 joule
D. 32 joule

796. The tuning of a radio or TV receiver is usually done by varying the _____ of the circuit.
A. inductance
B. capacitance
C. resistance
D. voltage

797. Which from the following radiations has the highest penetrating power?
A. Alpha rays
B. Beta rays
C. Gamma rays
D. None of these

798. The SI unit of force is
(A) Newton
(B) joule
(C) watt
(D) farad

799. Which from the following radiations is high-energy and high-speed particles?
A. Alpha rays
B. Beta rays
C. Gamma rays
D. None of these

800. The property that determines how much charge a capacitor can store is called
A. capacitance
B. resistance
C. electric charge
D. dipole moment

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