12th physics chapter 3 Bihar board with NCERT-Details & Highlights
| name of content | 12th physics chapter 3 full solution |
| content | physics objective type MCQ question with answer |
| name of subjects | class 12 physics |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th physics chapter 3 all objective solutions – download PDF
1. An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be
-
- (a) equal to its steady current
- (b) slightly higher than its steady current
- (c) slightly less than its steady current
- (d) zero
Answer: (b) slightly higher than its steady current
2. In the series combination of two or more than two resistances
-
- (a) the current through each resistance is same.
- (b) the voltage through each resistance is same.
- (c) neither current nor voltage through each re-sistance is same.
- (d) both current and voltage through each resis¬tance are same.
Answer: (a) the current through each resistance is same.
3. Combine three resistors 5 Q, 4.5 Q and 3 Q in such a way that the total resistance of this combination is maximum
-
- (a) 12.5 Q
- (b) 13.5 Q
- (c) 14.5 Q
- (d) 16.5 Q
Answer: (a) 12.5 Q
4. In parallel combination of n cells, we obtain
-
- (a) more voltage
- (b) more current
- (c) less voltage
- (d) less current
Answer: (b) more current
5. In a Wheatstone bridge if the battery and galvanometer are interchanged then the deflection in galvanometer will
-
- (a) change in previous direction
- (b) not change
- (c) change in opposite direction
- (d) none of these.
Answer: (b) not change
6. When a metal conductor connected to left gap of a meter bridge is heated, the balancing point
-
- (a) shifts towards right
- (b) shifts towards left
- (c) remains unchanged
- (d) remains at zero
Answer: (a) shifts towards right
7. In a potentiometer of 10 wires, the balance point is obtained on the 7th wire. To shift the balance point to 9th wire, we should
-
- (a) decrease resistance in the main circuit.
- (b) increase resistance in the main circuit.
- (c) decrease resistance in series with the cell whose emf is to be measured.
- (d) increase resistance in series with the cell whose emf is to be determined.
Answer: (d) increase resistance in series with the cell whose emf is to be determined.
8. AB is a wire of potentiometer with the increase in the value of resistance R, the shift in the balance point J will be
-
- (a) towards B
- (b) towards A
- (c) remains constant
- (d) first towards B then back towards A.
Answer: (a) towards B
9. A charge is moving across a junction, then
-
- (a) momentum will be conserved.
- (b) momentum will not be conserved.
- (c) at some places momenturii will be conserved and at some other places momentum will not be conserved.
- (d) none of these.
Answer: (d) none of these.
10. The I-V characteristics shown in figure represents
-
- (a) ohmic conductors
- (b) non-ohmic conductors
- (c) insulators
- (d) superconductors
Answer: b
11. Which of the following is correct for V-I graph of a good conductor?
-
- (a) ohmic conductors
- (b) non-ohmic conductors
- (c) insulators
- (d) superconductors
Answer: (b) non-ohmic conductors
12. The resistivity of alloy manganin is
-
- (a) Nearly independent of temperature
- (b) Increases rapidly with increase in temperature
- (c) Decreases with increase in temperature
- (d) Increases rapidly with decrease in temperature
Answer: (a) Nearly independent of temperature
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Bihar board 12th physics chapter 3 complete objective
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Bihar board 12th science stream subjects wise solution
click here to check out Bihar board science stream all subjects solutions
| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |