A diode valve is connected to a battery and a load resistance. The filament is heated so that a constant current is obtained in the circuit. As the cathode continuously emits electrons, does it get more and more positively charged?

A P-N junction diode connected to a battery of e.m.f. 4.5 V and an external resistance of 1000 Omega . What is the value of current in the circuit, if potential barrier in the diode = 0.5 V

A coil of induction 50 H is connected to a battery of emf 2 V through a resistance of 10 ohm. What is the time constant of the circuit and maximum value of current in the circuit ?

In a Coolidge tube, electrons strike the target and stop inside it. Does the target get more and more negatively charged as time passes?

A p-n junction diode in forward bias is connected to a battery of 4 V and a resistance of 80 omega as shown in the ajoining determine the maximum current in the circuit barrier potential of p-n diode is 0.2 V

An inductor of 3H is connected to a battery of emf 6V through a resistance of 100 Omega . Calculate the time constant. What will be the maximum value of current in the circuit ?

A galvanometer of resistance 25Omega is connected to a battery of 2V along with a resistance of 3000Omega . In this case, a full - scale deflection of 30 units is obtained in the galvanometer. In order or reduce this deflection to 10 units, how much more resistance ("in "Omega) should be added to the circuit in series?

Two junction diodes, one of germanium (Ge) and other of silicon (Si) are connected as shown in fig to a battery of 12 V and a load resistance 10 kOmega . The germanium diode conducts at 0.3 V and silicon diode at 0.7 V . When current flows in the circuit, the potential of terminal Y will be .

An uncharged capacitor of capacitance 8.0 mu F is connected to a battery of emf 6.0 V through a resistance of 24 Omega , then (ii) The current in the circuit at one time constant after the connections are made is :