In case of filament lamp at higher voltages, the resistance of lamp
A. Decreases
B. Increases
C. Remains constant
D. Varies depending on the filament
If distance is increasing uniformly with time, then velocity is
A. Decreasing
B. Decreasing
C. Constant
D. Zero
In semiconductors upon increasing temperature, conductivity will
A. Decreases
B. Increases Â
C. Remains constant
D. Haphazard
Component which obeys Ohm’s Law is called
A. Resistive component
B. Efficient component
C. Ohmic component
D. Non-Ohmic component
At constant temperature, resistance and cross-sectional area are
A. Directly related
B. Not related
C. Remains constant
D. Inversely related
Speed of a body in particular direction can be called
A. Acceleration
B. Displacement
C. Velocity
D. Distance
A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If the atmospheric pressure is assumed to be 100 kPa and thickness of the tank walls is assumed to be negligible, the force exerted by the atmosphere on the surface of the water is
A. 20 kN
B. 50 kN
C. 100 kN
D. 200 kN
The most abundant component in Earth’s atmosphere (or Air) is
A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon dioxide
The percentage by mass of any element is calculated with the help of
A. Formula of compound only
B. Relative atomic masses only
C. Nucleon number
D. Formula of compound and relative atomic masses
Chloro fluoro Carbons (CFCs) are not
A. Flammable only
B. Toxic only
C. Harmful Flammable and toxic
D. Non-flammable