Physics Chapter 7 Entry test MCQs
76. One of the following is an ohmic device
a. Transistor
b. Filament bulb
c. Copper wire
d. Semiconductor diode
77. The change in a resistance of metallic conductor below 0°C’
a. Linear
b. Nonlinear
c. Curvilinear
d. Curve
78. The power of an electric bulb is 100W. It is connected to 110V power is supply. The resistance of electric bulb will be?
a. 20 Ω
b. 11 Ω
c. 200 Ω
d. 121 Ω
79. If length of the wire becomes two time Its original value,the original value and area becomes one half to then resistance of the to wire becomes:
a. One half
b. Double
c. One fourth
d. Four times
80. Conductivity depend on
a. Area
b. Temperature and nature of material
c. Length
d. All
81. A load of resistance 0.04 Ω is attached to the cell having E.M.F 1.5 V and 15 A is drawn in the circuit. The internal resistance of cell will be
a. 6 Ω
b. 0.6 Ω
c. 0.3 Ω
d. 0.06 Ω
82. Bulb Having Current 200A, and Voltage 220 find Power
a. 44watt
b. 22kw
c. 40 kw
d. 44kw
83. A heater of 400 Watt was on for 5 hours what is electrical Consumption
a. 2KWH
b. 20KwH
c. 12 KWH
d. None
84. Which of the following bulb has least resistance:
a. 200 W
b. 50 W
c. 300 W
d. 100 W