Question

what is the total current dawn on this circuit

if both if these appliance run continuously for 2.5 minutes how much energy is consumed

4. Suppose that a particular kitchen circuit has two appliances both plugged in and running Blender (on highest setting), which draws 10.5 A Microwave oven, which draws 8.8 A a. What is the total current drawn on this circuit? Is this likely to trip the circuit breaker of a typical 120-V household circuit? A. 1.7 A B. 4.8 A C. 9.7 A D. 15.3 A E. 19.3 A b. If both of these appliances run continuously for 2.50 minutes, how much energy is consumed? A. 347J B. 3.47 kJ C. 34.7 kJ D. 347 kJ E 3.47 MJ

Answer 1

There are two appliances in kitchen

Now in our house all the appliances are connect in parallel

Therefore this two appliances are also connect in parallel

Hence in parallel circuit voltage is always same across each appliances but the current is different across both the appliances .

Now the current through the blender I1 = 10.5 A

The current through the microwave oven I2 = 8.8A

Hence the total current in the circuit is

I = I1 + I2 = 10.5 +8.8 = 19.3 A

Hence E is correct answer

b) now if both of these appliances running for time t=2.5 minutes

t = 2.5 *60 sec

Now the power required fir circuit is

P= VI

P = 120*19.3 = 2316 W

Now the energy required is

E = P*t

E = 2316 *2.5*60

E = 347400 J

E = 347.4 KJ

Hence energy approx will be

E = 347 KJ

Hence d is an answer