Physics-
General
Easy
Question
If in p-n junction diode, a square input signal of 10 V is applied as shown. Then the output signal across R L will be
The correct answer is:
Diode is forward biased in first half cycle and amplitude of signal is 5V
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The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit?
The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit?
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If the lattice constant of this semiconductor is decreased, then which of the following is correct?
If the lattice constant of this semiconductor is decreased, then which of the following is correct?
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Statement-1 : The temperature coefficient of resistance is positive for metals and negative for P-type semiconductor.
Statement-2 : The effective charge carriers in metals are negatively charged whereas in P-type semiconductor they are positively charged.
Statement-1 : The temperature coefficient of resistance is positive for metals and negative for P-type semiconductor.
Statement-2 : The effective charge carriers in metals are negatively charged whereas in P-type semiconductor they are positively charged.
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The electrical circuits used to get smooth d.c. output from a rectified circuit is called
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The current flowing through the zener diode in fig. is-
The current flowing through the zener diode in fig. is-
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Two junction diodes one of germanium (Ge) and other of silicon (Si) are connected as shown in figure to a battery of emf 12 V and a load resistance 10 k 
. The germanium diode conducts at 0.3 V and silicon diode at 0.7 V. When a current flows in the circuit, the potential of terminal Y will be-
Two junction diodes one of germanium (Ge) and other of silicon (Si) are connected as shown in figure to a battery of emf 12 V and a load resistance 10 k . The germanium diode conducts at 0.3 V and silicon diode at 0.7 V. When a current flows in the circuit, the potential of terminal Y will be-
Physics-General
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If VA and VB denote the potentials of A and B, then the equivalent resistance between A and B in the adjoint electric circuit is-
If VA and VB denote the potentials of A and B, then the equivalent resistance between A and B in the adjoint electric circuit is-
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Chemistry-
This reaction is called
This reaction is called
Chemistry-General
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In the following compounds :
I) 
II) 
III) 
IV) 
the order of basicity is
In the following compounds :
I)
II)
III)
IV)
the order of basicity is
Chemistry-General
Chemistry-
Chemistry-General
Chemistry-
The correct order of basicities of the following compounds is
1) 
2) 
3) 
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The correct order of basicities of the following compounds is
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2)
3)
4)
Chemistry-General
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The following reaction is
The following reaction is
Chemistry-General
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The products A, B and C in the following sequence of reactions respectively are
The products A, B and C in the following sequence of reactions respectively are
Chemistry-General
Physics-
An armoured car 2 m long and 3 m wide is moving at 10 ms–1 when a bullet hits it in a direction making an angle 
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An armoured car 2 m long and 3 m wide is moving at 10 ms–1 when a bullet hits it in a direction making an angle with the length of the car as seen by a stationary observer. The bullet enters one edge of the car at the corner and passes out at the diagonally opposite corner. Neglecting any interaction between the car and the bullet, the time for the bullet to cross the car is
Physics-General
