Home
Class 12
PHYSICS
The anode of a thermionic diode is conne...

The anode of a thermionic diode is connected to the negative terminal of a battery and the cathode to its positive terminal.

A

No appreciable current will pass through the diode.

B

A large current will pass through the diode from the anode to the cathode.

C

A large current will pass through the diode from the cathode to the anode.

D

The diode will be damaged

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CURRENT THROUGH GASES

    HC VERMA|Exercise Objective 2|7 Videos
  • ELECTRIC CURRENT THROUGH GASES

    HC VERMA|Exercise Exercises|23 Videos
  • ELECTRIC CURRENT THROUGH GASES

    HC VERMA|Exercise Short Answer|10 Videos
  • ELECTRIC CURRENT IN CONDUCTORS

    HC VERMA|Exercise Exercises|84 Videos
  • ELECTRIC FIELD AND POTENTIAL

    HC VERMA|Exercise Exercises|75 Videos

Similar Questions

Explore conceptually related problems

A working transitor with its three legs marked P, Q and R is tested using a multimeter No conduction is found between P, Q by connecting the common (negative) terminal of the multimeter to R and the other (positive) terminal to or Q some resistance is seen on the multimeter . Which of the following is true for the transistor ?

A 2V battery is connected across AB as shown in the figure. The value of the current supplied by the battery when in one case battery's positive terminal is connected to A and in other case when positive terminal of battery is connected to B will respectively be :-

Two cells of voltage 10 V and 2 V and internal resistances 10 Omega and 5 Omega respectively, are connected in parallel with the positive end of 10V battery connected to negative pole of 2 V battery (figure). Find the effective voltage and effective resistance of the combination.

A device whose one end is connected to -ve terminal and other end connected to +ve terminal. If both ends are interchanged with suppy then current is not flowing then device will be-

When connected across the terminals of a cell, a voltmeter measures 5 V and a connected ammeter measures 10 A of current. A resistance of 2 ohm s is connected across the terminals of the cell. The current flowing through this resistance will be

Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle. she got a severe electric shock. Shalini put off the main switch qUickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug. Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals. On the basis of the above passage, answer the following questions: What values are displayed by Shalini in this incident?

Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle. she got a severe electric shock. Shalini put off the main switch qUickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug. Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals. On the basis of the above passage, answer the following questions: Which wire red. black or green, touched the metal case of electric kettle when Shalini.s mother got electric shock?

Shalini is a student of class X. Her mother was preparing tea in an old electric kettle having metal case. When she switched on the electric kettle. she got a severe electric shock. Shalini put off the main switch qUickly and found that the connecting cord was torn, where her mother touched the metal case of the kettle. She also found that the red and black wires of the connecting cord were firmly connected to the two lower terminals of the power plug but the green wire of the cord was not connected to the upper terminal of the plug. Shalini replaced the torn connecting cord and also connected the three wires of the cord firmly to the power plug terminals. On the basis of the above passage, answer the following questions: Why did Shalini switch off the main switch qUickly?

Assertion : In a simple battery circuit the point of lowest potential is positive terminal of the battery. Reason : The current flows towardi, the point of the higher potential as It nows In such a circuit from the negative to the positive terminal.

When the electric current is passed through a cell having an electrolyte, the positive ions move towards cathode and negative ions toqards the anode. If the cathode is pulled out of the solution .