Physics-
General
Easy
Question
4 ideal diodes are connected as shown in the circuit the current through 50 
is
- 0.1 A
- 0.5 A
- 0.6 A
- 1 A
The correct answer is: 0.1 A
Related Questions to study
physics-
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.
physics-General
physics-
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
physics-
If 
r is resistance offered by diode in forward bias then current through the diode is
If r is resistance offered by diode in forward bias then current through the diode is
physics-General
physics-
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
physics-
In the figure shown, the speed of the truck is v to the right. The speed with which the block is moving up at 
is :
In the figure shown, the speed of the truck is v to the right. The speed with which the block is moving up at is :
physics-General
physics-
System is shown in figure and wedge is moving towards left with speed 2 m/s. Then velocity of the block B will be
System is shown in figure and wedge is moving towards left with speed 2 m/s. Then velocity of the block B will be
physics-General
physics-
System is shown in the figure and man is pulling the rope from both sides with constant speed ‘u’. Then the velocity of the block will be
System is shown in the figure and man is pulling the rope from both sides with constant speed ‘u’. Then the velocity of the block will be
physics-General
physics-
A rigid horizontal smooth rod AB of mass 0.75 kg and length 40 cm can rotate freely about a fixed vertical axis through its mid point O. Two rings each of mass 1 kg are initially at rest at a distance of 10 cm from O on either side of the rod. The rod is set in rotation with an angular velocity of 30 radians per second. The velocity of each ring along the length of the rod in m/s then they reach the ends of the rod is
A rigid horizontal smooth rod AB of mass 0.75 kg and length 40 cm can rotate freely about a fixed vertical axis through its mid point O. Two rings each of mass 1 kg are initially at rest at a distance of 10 cm from O on either side of the rod. The rod is set in rotation with an angular velocity of 30 radians per second. The velocity of each ring along the length of the rod in m/s then they reach the ends of the rod is
physics-General
physics-
A conical pendulum consists of a mass M suspended from a string of length l. The mass executes a circle of radius R in a horizontal plane with speed v. At time t, the mass is at position i 
and has velocity 
v . At time t, the angular momentum vector of the mass M about the point from which the string suspended is :
A conical pendulum consists of a mass M suspended from a string of length l. The mass executes a circle of radius R in a horizontal plane with speed v. At time t, the mass is at position i and has velocity v . At time t, the angular momentum vector of the mass M about the point from which the string suspended is :
physics-General
physics-
A cylinder having radius 0.4 m, initially rotating (at t = 0) with = 54 rad/sec is placed 
= 0.5. The time taken 
having friction coefficient on a rough inclined plane with by the cylinder to start pure rolling is :
. 
A cylinder having radius 0.4 m, initially rotating (at t = 0) with = 54 rad/sec is placed = 0.5. The time taken having friction coefficient on a rough inclined plane with by the cylinder to start pure rolling is :
.
physics-General
physics-
A wheel is made to roll without slipping, towards right, by pulling a string wrapped round a coaxial spool as shown in figure. With what velocity the string should be pulled so that the centre of the wheel moves with a velocity of 3 m/s?
A wheel is made to roll without slipping, towards right, by pulling a string wrapped round a coaxial spool as shown in figure. With what velocity the string should be pulled so that the centre of the wheel moves with a velocity of 3 m/s?
physics-General
physics-
An elastic string of natural length 3l o is cut into two parts so that their natural lengths are 2l o and l o respectively. They are attached to points P and Q the vertical distance between P and Q being l o and the horizontal distance being 12cm. A uniform rod CD=40cm is in equilibrium supported by the string at A and B. If the rod CD is horizontal then the lengths of the parts CA and BD in cms are
An elastic string of natural length 3l o is cut into two parts so that their natural lengths are 2l o and l o respectively. They are attached to points P and Q the vertical distance between P and Q being l o and the horizontal distance being 12cm. A uniform rod CD=40cm is in equilibrium supported by the string at A and B. If the rod CD is horizontal then the lengths of the parts CA and BD in cms are
physics-General
physics-
AB and CD are two identical rods each of length L and mass M joined to form a cross. Find the M.I. of the system about a bisector of the angle between the rods (XY)
AB and CD are two identical rods each of length L and mass M joined to form a cross. Find the M.I. of the system about a bisector of the angle between the rods (XY)
physics-General
physics-
A uniform rod of mass m is bent into the form of a semicircle of radius R. The moment of inertia of the rod about an axis passing through A and perpendicular to the plane of the paper is
A uniform rod of mass m is bent into the form of a semicircle of radius R. The moment of inertia of the rod about an axis passing through A and perpendicular to the plane of the paper is
physics-General
physics-
An inverted “V” is made up of two uniform boards each weighing 200 N. Each side has the same length and makes an angle 30° with the vertical as shown in figure. The magnitude of the static frictional force that acts on each of the lower end of the V is
An inverted “V” is made up of two uniform boards each weighing 200 N. Each side has the same length and makes an angle 30° with the vertical as shown in figure. The magnitude of the static frictional force that acts on each of the lower end of the V is
physics-General
