An electric motor exerts a constant torq...

An electric motor exerts a constant torque `5Nm` on a fly wheel by which it is rotated at the rate of `420 rpm` The power of motor is

`110 watt`

`150 watt`

`220 watt`

`300 watt`

Text Solution

Verified by Experts

The correct Answer is:

`p=tauomega`

Topper's Solved these Questions

SYSTEM OF PARTICLES
NARAYNA|Exercise Level-II(C.W.)|64 Videos
SYSTEM OF PARTICLES
NARAYNA|Exercise Level-III|66 Videos
SYSTEM OF PARTICLES
NARAYNA|Exercise C.U.Q.|83 Videos
PHYSICAL WORLD
NARAYNA|Exercise C.U.Q|10 Videos
SYSTEM OF PARTICLES AND ROTATIONAL MOTION
NARAYNA|Exercise EXERCISE - IV|39 Videos

Similar Questions

Explore conceptually related problems

A electric motor is a device which transforms :

An electric motor creates a tension of 4500 newton in a hoisting cable and reels it at the rate of 2 m//s . What is the power of the motor ?

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor (in Watts ) is

The fly wheel of a large motorin a factory has mass 30kg and moment of inertia 67.5 kg-m^(2) about its rotation axis. The motor develops a constanttorque of 600N-m, and the fly wheel starts from rest, (a) What is the angular acceleration of the fly wheel ? (b) What is its angular velocity after making 4 revolutions ? (c) How much work is done by the motor during the first 4 revolutions ? (d) What is the average power output ofthe motor during the first 4 revolutions ?

An electric motor rotates a wheel at a constant angular velocity 10rps while opposing torque is 10Nm . The power of that electric motor is

An electric motor rotates a wheel at a constant angular velocity (omega) while opposing torque is tau . The power of that electric motor is

An external device, e.g an electric motor supplies constant power to a rotating system e.g., a flywheel through a torque tau power angular velocity of the system is omega Both tau and omega are variable

An electric motor in a crane while lifting a load produces a tension of 4000 N in the cable attached to the load. If the motor is winding the cable at the rate of 3ms^(-1) , the power of the motor espressed in kilo watt units must be

NARAYNA-SYSTEM OF PARTICLES-Level-1(C.W.)

If the earth were to suddenly contract to 1//n^(th) of its present rad...
Text Solution
|
A particle performing uniform circular motion gas angular momentum L. ...
Text Solution
|
A ballet dancer is rotating about his own vertical axis at an angular ...
Text Solution
|
A thin circular ring of mass M and radius r is rotating about its axis...
Text Solution
|
A ballet dancer is rotating at angular velocity omega on smooth horizo...
Text Solution
|
A particle of mass m is moving along a circle of radius r with a time ...
Text Solution
|
If the radius of earth shrinks by 0.2% without change in its mass, the...
Text Solution
|
A metallic circular plate is rotating about its axis without friction....
Text Solution
|
A constant torque acting on a uniform circular wheel changes its angul...
Text Solution
|
Density remaining constant, if earth contracts to half of its present ...
Text Solution
|
A mass is whirled in a circular path with an angular momentum L. If th...
Text Solution
|
An automobile engine develops 100 kilo-watt, when rotating at a speed ...
Text Solution
|
An electric motor exerts a constant torque 5Nm on a fly wheel by which...
Text Solution
|
A shaft rotating at 3000 rpm is transmitting a power of 3.14 KW. The m...
Text Solution
|
A solid sphere rolls down without slipping from rest on a 30^@ incline...
Text Solution
|
A hollow sphere rolls down a 30^@ incline of length 6m without slippin...
Text Solution
|
For a body rolling along a level surface, the translational and rotati...
Text Solution
|
A ring and a disc of same mass roll without slipping along a horizonta...
Text Solution
|
When a hollow sphere is rolling without slipping on a rough horizontal...
Text Solution
|
If a sphere of mass 2kg and diameter 10cm is rolling at speed of 5ms^(...
Text Solution
|