Numericals of Marine Electro Technology asked in E pariksha online exam

WE REQUEST THE READERS TO ANSWER THE NUMERICALS IN THE COMMENT COLUMN GIVEN BELOW SO THAT THE ANSWER WILL BE AVAILABLE TO ALL CANDIDATES APPEARING FOR THE EXAM. MOREOVER THESE ANSWERS WILL BE AVAILABLE AT ALL THE TIME.

 1) A certain appliance uses 750 W. If it is allowed to run continuously for 15 days, how many kilowatt-hours of energy does it consume?

ANS 750*15*60/1000 

2) What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it? 

ANS 75*4 

3) If it takes 35 J of energy to move a charge of 6 C from one point to another, what is the voltage between the two points? Your answer should be correct to two decimals. 

4) Calculate the Velocity of the conductor (up to 0 decimal places), if terminal voltage is 2.2 V/m and the magnetic field strength is 0.2 T. . 

5) Calculate the frequency of the motor ( up to 0 decimal places), if the speed if 4800 Rpm and number of Poles is 2. 

ANS 120*F/P 

6) If the resistance of any coil is 120 Ohm. Calculate the Resistance (up to 0 decimal places), when its Length is increased by 20% and its Diameter is increased by 50%. 

ANS RESISTANCE = RHO*LENGTH/CROSS SECTIONAL AREA 

7) What is the power in a Resistor in Milli Watts (up to 0 decimal places), having Resistance of 12 Ohm having a Potential Difference of 3 V. 

ANS POWER=VOLTAGE*VOLTAGE/RESISTANCE (ANS*1000 TO CONVERT TO MILLIWATTS) 

8) what happens to the amount of energy stored in the electromagnetic feild when the current thro an inductor is cut in half.. 9) electrons and protons of the same momentum enter normally into a uniform magnetic field of flux density B. mass of the electron is me (m suffix e) and mass of the proton is mp (m suffix p).if re (r suffix e) and rp (r suffix p) represents the radii of the path of the electrons and the protons respectively. calculate the ratio re/rp. your answer should be correct to 2 decimals..