The Timer has started 10:00
-
1)
If we connect 3 capacitors in parallel, the combined effect of all these capacitors will be
- A) Equal to the sum of individual capacitances
- B) sum of reciprocals of individual capacitors
- C) zero
- D) product of all
-
2)
Semiconductor element in pure form is called
- A) extrinsic
- B) P type
- C) intrinsic
- D) N type
-
3)
In an N- type semicondutor material , the majority carrier are
- A) holes
- B) electrons
- C) ions
- D) protons
-
4)
An element with 6 protons and 6 neutrons has atomic no. value
- A) 6
- B) 5
- C) 12
- D) 0
-
5)
Isotopes of an element have
- A) Different mass number but same atomic number
- B) Different atomic number but same mass number
- C) Same atomic and mass number
- D) Same no. of neutron
-
6)
Which of the following is true about the electrical circuit in your flashlight?
- A) The battery supplies the charge (electrons) which move through the wires.
- B) The battery supplies the charge (protons) which move through the wires
- C) The battery supplies energy which raises charge from low to high voltage
- D) Battery gets energy from circuit.
-
7)
If we connect 3 capacitors in series, the combined effect of all these capacitors will be
- A) equal to the sum of individual capacitors
- B) the sum of reciprocals of individual capacitors
- C) zero
- D) product of all
-
8)
Across which resistance more voltage is dropped
- A) 4Ω
- B) 7Ω
- C) same across both
- D) no voltage drop
-
9)
Leakage current of semiconductor diode is caused by
- A) chemical energy
- B) heat energy
- C) barrier voltage
- D) doping impurity
-
10)
Rectification is the process of
- A) converting DC into AC
- B) increasing output waveform
- C) converting AC into DC
- D) converting diode into capacitor
