An audio amplifier produces an alternating output of 12 V before the connection to a load. The amplifier has an equivalent resistance of 15 Ω at the output. What resistance the load need to have to produce maximum power ? Also calculate the power output under this condition.

For the a.c. generator shown in Fig. 1.22 (i), find (i) the value of load so that maximum power is transferred to the load (ii) the value of maximum power.

Using Thevenin’s theorem, find the current through 100 Ω resistance connected across terminals A and B in the circuit of Fig. 1.27.

Show that when Thevenin’s equivalent circuit of a network is converted into Norton’s equivalent circuit, I_N = E₀ /R₀ and R_N = R₀. Here E₀ and R₀ are Thevenin voltage and Thevenin resistance respectively.

The outermost orbit of an atom can have a maximum of .............. electrons.
(i) 8
(ii) 6
(iii) 4
(iv) 3

When the outermost orbit of an atom has less than 4 electrons, the material is generally a ..............
(i) non-metal
(ii) metal
(iii) semiconductor
(iv) none of above

Utah Mink, the first wild animal to be infected by coronavirus, belongs to which country?
[A] Japan
[B] China
[C] United States
[D] Australia

Financial intelligence Unit (FIU) has imposed penalty on which payment gateway major, for violating anti-money laundering law?
[A] VISA
[B] PayPal
[C] RazorPay
[D] American Express

Which international association has banned to export plastic wastes to poorer countries?
[A] G-20
[B] European Union
[C] G-7
[D] BRICS

Which country released a bill that would increase monitoring of civil society groups?
[A] Turkey
[B] United States
[C] Germany
[D] North Korea

The Embassy of which country has appointed a Honorary Consul in the North-Eastern region?
[A] Japan
[B] Singapore
[C] Israel
[D] Thailand