Physics-
General
Easy
Question
Gap between two positions of the lens is
- 80 cm
- 60 cm
- 40 cm
- 20 cm
The correct answer is: 20 cm
Related Questions to study
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The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line
The load versus elongation graph for four wires of the same material is shown in the figure. The thinnest wire is represented by the line
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From the circuit shown below, the maximum and minimum values of zener diode current are
From the circuit shown below, the maximum and minimum values of zener diode current are
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In the figure shown, the potential drop across each capacitor is (assume diodes to be ideal)
In the figure shown, the potential drop across each capacitor is (assume diodes to be ideal)
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The I-V characteristic of an LED is
The I-V characteristic of an LED is
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In the figure, the input is across terminals A and C and the output is across B and D. Then the output is
In the figure, the input is across terminals A and C and the output is across B and D. Then the output is
physics-General
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A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit
A p–n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit
physics-General
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The equivalent resistance between A and B is
The equivalent resistance between A and B is
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The equivalent resistance of the circuit across AB is given by
The equivalent resistance of the circuit across AB is given by
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Find the effective resistance between A & B
Find the effective resistance between A & B
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4 ideal diodes are connected as shown in the circuit the current through 50W is
4 ideal diodes are connected as shown in the circuit the current through 50W is
physics-General
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The circuit shown in figure (A) Contains two diodes each with a forward resistance of 50 ohm and with infinite reverse resistance. If the battery voltage is 6 V, the current through the 100 ohm resistance is.
The circuit shown in figure (A) Contains two diodes each with a forward resistance of 50 ohm and with infinite reverse resistance. If the battery voltage is 6 V, the current through the 100 ohm resistance is.
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A PN junction diode when forward biased has a drop of 0.5V which is assumed to be independent of current. The current in excess of 10mA through the diode produces large joule heating which damages the diode. If we want to use a 1.5V battery to forward bias the diode, the resistor used in series with the diode so that the maximum current does not exceed 5mA is
A PN junction diode when forward biased has a drop of 0.5V which is assumed to be independent of current. The current in excess of 10mA through the diode produces large joule heating which damages the diode. If we want to use a 1.5V battery to forward bias the diode, the resistor used in series with the diode so that the maximum current does not exceed 5mA is
physics-General
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If V1> V2 ,r is resistance offered by diode in forward bias then current through the diode is
If V1> V2 ,r is resistance offered by diode in forward bias then current through the diode is
Physics-General
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Two similar p-n junctions can be connected in three different ways as shown in the figures. The two connections across which the potential difference is same are
a) 
b) 
c) 
Two similar p-n junctions can be connected in three different ways as shown in the figures. The two connections across which the potential difference is same are
a)
b)
c)
physics-General
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In the following , reverse biased diode is
In the following , reverse biased diode is
Physics-General
