The radius of orbit of a planet is two times that of the earth. The time period
The radius of orbit of a planet is two times that of the earth. The time period of planet is
Options
(a) 4.2 year (b) 2.8 year (c) 5.6 year (d) 8.4 year
Questions
When there is no heat change from surroundings in a system, then the process
When there is no heat change from surroundings in a system, then the process taking place is
Options
(a) isobaric (b) isochoric (c) adiabatic (d) isothermal
Correct Answer:
adiabatic
Explanation:
No explanation available. […]
If 75% of the radioactive reaction is completed in 2 hrs, what would be
If 75% of the radioactive reaction is completed in 2 hrs, what would be the half life period?
Options
(a) 1 hour (b) 1.5 hour (c) 2 hour (d) 3 hour
Correct Answer: […]
The current in the coil of inductance 5H decreases at the rate of 2 A/s
The current in the coil of inductance 5H decreases at the rate of 2 A/s. The induced e.m.f is
Options
(a) 2 V (b) 5 V (c) 10 V (d) -10 V
Correct […]
The ratio of the numerical value of the average velocity and average speed
The ratio of the numerical value of the average velocity and average speed of a body is always
Options
(a) Unity (b) Unity or less (c) Unity or more (d) Less than unity
If a magnetic substance is kept in a magnetic field, then which of the following
If a magnetic substance is kept in a magnetic field, then which of the following is thrown out
Options
(a) paramagnetic (b) ferromagnetic (c) diamagnetic (d) antiferromagnetic
Correct Answer:
diamagnetic
Explanation:
No explanation […]
A thin wire of resistance 4 ohm is bent to form a circle. The resistance across
A thin wire of resistance 4 ohm is bent to form a circle. The resistance across any diameter is
Options
(a) 4 ohm (b) 2 ohm (c) 1 ohm (d) 8 ohm
Correct […]
The minimum wavelength of X-rays emitted by X-ray tube is 0.4125Å
The minimum wavelength of X-rays emitted by X-ray tube is 0.4125 Å. The accelerating voltage is
Options
(a) 30 kV (b) 50 kV (c) 80 kV (d) 60 kV
Correct Answer:
30 kV
Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds
Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds. The velocity of sound is
Options
(a) 300 m/s (b) 310 m/s (c) 320 m/s (d) 330 m/s
Correct […]
Electric potential at any point is V= -5x +3y + √(15) z. Then the magnitude of electric
Electric potential at any point is V= -5x +3y + √(15) z. Then the magnitude of electric field is
Options
(a) 3 √2 (b) 4 √2 (c) 5 √2 (d) 7
Correct Answer: […]